package com.loop.netty.codec;

import io.netty.buffer.ByteBuf;
import io.netty.channel.ChannelHandlerContext;
import io.netty.channel.ChannelInboundHandlerAdapter;
import io.netty.util.CharsetUtil;

/**
 * @author zhangxiaolu
 * @since 2023-09-10 22:36
 */
public class SimpleNettyClientHandler extends ChannelInboundHandlerAdapter {

    // 当通道就绪就会触发该方法
    @Override
    public void channelActive(ChannelHandlerContext ctx) throws Exception {
        // 发送一个Student 对象到服务器
        StudentPojo.Student student = StudentPojo.Student.newBuilder()
                .setId(4).setName("豹子头 林冲").build();
        ctx.writeAndFlush(student);
        System.out.println("客户端发送消息成功");
    }

    // 当通道有读取事件时触发该方法
    @Override
    public void channelRead(ChannelHandlerContext ctx, Object msg) throws Exception {
        ByteBuf buf = (ByteBuf) msg;
        System.out.println("客户端收到消息：" + buf.toString(CharsetUtil.UTF_8));
        System.out.println("服务器的地址是：" + ctx.channel().remoteAddress());
    }

    // 发生异常时触发该方法
    @Override
    public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) throws Exception {
        System.out.println("客户端异常了");
        cause.printStackTrace();
        ctx.close();
    }
}
